Peer ID personalization

[Lilit0x]

This PR solves the issue of getting a random peer id. A peer id can now be deterministic by setting a value we call seed key in the config file.
Check the readme for instructions.

[codecov]

Codecov Report

Merging #5 (c7a008b) into main (f716234) will increase coverage by 1.43%.
The diff coverage is 86.88%.

@@            Coverage Diff             @@
##             main       #5      +/-   ##
==========================================
+ Coverage   66.16%   67.60%   +1.43%     
==========================================
  Files          11       11              
  Lines        1005     1062      +57     
==========================================
+ Hits          665      718      +53     
- Misses        340      344       +4     

Files Changed	Coverage Δ
share/src/network/hole_puncher.rs	0.00% <0.00%> (ø)
share/src/config.rs	83.26% <91.07%> (+2.47%)	⬆️
share/src/handlers/security.rs	97.45% <100.00%> (+0.01%)	⬆️
share/src/item/mod.rs	86.61% <100.00%> (+0.09%)	⬆️